CDx4AC161 4-Bit Synchronous Binary Counters

1 Features

• Internal look-ahead for fast counting

• Carry output for n-bit cascading

• Synchronous counting

• Synchronously programmable

• SCR-latchup-resistant CMOS process and circuit

design

• Exceeds 2kV ESD protection per MIL-STD-883,

method 3015

2 Description

The ’AC161 devices are 4-bit binary counters.

These synchronous, presettable counters feature an

internal carry look-ahead for application in high-speed

counting.

Device Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

BODY SIZE(3)

CDx4AC161

E (PDIP, 16)

19.3mm x 9.4mm

19.3mm x 6.35mm

M (SOIC, 16)

9.9mm x 6mm

9.9mm x 3.9mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

(3)

The body size (length × width) is a nominal value and does

not include pins.

Logic Diagram (Positive Logic)

CD54AC161, CD74AC161

SCHS239D – NOVEMBER 1998 – REVISED MAY 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.